* {
	margin: 0 auto;
}

.main {
	height: 400px;
	width: 400px;
	margin-top: 100px;
	text-align: center;
	border: 1px solid red;
	border-radius: 10px;
	box-shadow: 2px 2px 2px #888888;
}

.content {
	padding-top: 100px;
	height: 20px;
	width: 400px;
}

#username{
	margin-bottom: 10px;
}


.choice {
	margin: 0 auto;
	height: 20px;
	width: 100px;
	padding-top: 100px;
}

#login_btn {
	float: left;
}

#back_btn{
	float: right;
}
